Learning: developer App that does instagram authentication and retrieve user's pictures

Hi all, I started looking into Flutter and Instagram/Facebook login and basic display API.

I am learning how to create a basic app that authenticates users via Instagram and access user's pictures list. I created a FB app and gave to it Facebook Login and Instagram Basic Display, in Flutter I use Instagram ID and secret. I made successfully the login but for the basic display (access to pictures) I don't understand if I have to submit the request to review the app even if it's just for learning, which would be a bit weird. Do you know what can cause the pending status?

Asked about 2 months ago